<template>
  <div class="execution">
    <basic-container>
      <avue-crud ref="crud" :page.sync="page" :data="tableData" :permission="permissionList" :table-loading="tableLoading" :option="tableOption" @on-load="getList" @search-change="searchChange" @refresh-change="refreshChange" @size-change="sizeChange" @current-change="currentChange" @row-update="handleUpdate" @row-save="handleSave" @row-del="handleDel">
        <template slot="menuLeft">
          <el-button class="filter-item" v-if="permissions.mall_xglqrcodepayment_del" plain type="danger" size="small" icon="el-icon-remove" @click="handleDels">批量删除</el-button>
          <el-button v-if="permissions.mall_xglqrcodepayment_export" class="filter-item" plain type="primary" size="small" icon="el-icon-download" @click="exportExcel">导出</el-button>
        </template>
        <template slot-scope="{type,size,row,index}" slot="menu">
          <el-button icon="el-icon-check" :size="size" :type="type" @click="showQRcode(row,index)">查看二维码</el-button>
        </template>
      </avue-crud>
      <el-dialog title="立牌二维码" :visible.sync="avatarCodeShow" width="50%" center>
        <div class="qrcode-box">
          <div class="qrcodeDownBtn">
            <el-button size="small" type="primary" plain @click="download">导出图片</el-button>
          </div>
          <div class="downImg" ref="qrcodeDownRef">
            <canvas ref="qrCodeRef"></canvas>
            <div class="title">{{merchantName}}</div>
          </div>
        </div>
      </el-dialog>
    </basic-container>
  </div>
</template>

<script>
import QRCode from 'qrcode'
import html2Canvas from 'html2canvas'
import { fetchList, getObj, addObj, putObj, delObj, delObjs } from '@/api/mall/xglQrcodePayment'
import { tableOption } from '@/const/crud/mall/xglQrcodePayment'
import { mapGetters } from 'vuex'

export default {
  name: 'xglQrcodePayment',
  data() {
    return {
      searchForm: {},
      tableData: [],
      page: {
        total: 0, // 总页数
        currentPage: 1, // 当前页数
        pageSize: 20 // 每页显示多少条
      },
      tableLoading: false,
      tableOption: tableOption,
      avatarCodeShow: false,
      merchantName: ""
    }
  },
  computed: {
    ...mapGetters(['permissions']),
    permissionList() {
      return {
        viewBtn: this.vaildData(this.permissions.mall_xglqrcodepayment_view, false),
        addBtn: this.vaildData(this.permissions.mall_xglqrcodepayment_add, false),
        delBtn: this.vaildData(this.permissions.mall_xglqrcodepayment_del, false),
        editBtn: this.vaildData(this.permissions.mall_xglqrcodepayment_edit, false)
      };
    }
  },
  methods: {
    download() {
      const ref = this.$refs.qrcodeDownRef
      html2Canvas(ref, {
        backgroundColor: '#e8f4ff',
        useCORS: true // 如果截图的内容里有图片,可能会有跨域的情况,加上这个参数,解决文件跨域问题
      }).then((canvas) => {
        const dataURL = canvas.toDataURL('image/png')
        const creatDom = document.createElement('a')
        document.body.appendChild(creatDom)
        creatDom.href = dataURL
        creatDom.download = '立牌'
        creatDom.click()
      })
    },
    showQRcode(row) {
      this.avatarCodeShow = true
      this.merchantName = row.merchantName
      this.$nextTick(() => {
        var url = row.linkUrl;
        let opts = {
          text: url,
          width: 200,
          height: 200,
          margin: 0,//二维码留白边距
          type: 'image/png',
          color: {
            dark: '#333333',
            light: '#fff'
          },
          quality: 0.3,//二维码质量
          errorCorrectionLevel: 'L',
        }
        QRCode.toCanvas(this.$refs.qrCodeRef, url, opts)
      })
    },
    // 列表查询
    getList(page, params) {
      this.tableLoading = true
      fetchList(Object.assign({
        current: page.currentPage,
        size: page.pageSize
      }, params, this.searchForm)).then(response => {
        this.tableData = response.data.data.records
        this.page.total = response.data.data.total
        this.tableLoading = false
      }).catch(() => {
        this.tableLoading = false
      })
    },
    // 删除
    handleDel: function(row, index) {
      this.$confirm('是否确认删除ID为' + row.code, '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(function() {
        return delObj(row.code)
      }).then(data => {
        this.$message.success('删除成功')
        this.getList(this.page)
      })
    },
    handleDels() {
      if (this.$refs.crud.tableSelect.length === 0) {
        this.$message.error('请选择后进行删除')
        return false
      }
      let Ids = []
      for (const row of this.$refs.crud.tableSelect) {
        Ids.push(row.code)
      }
      delObjs(Ids).then(() => {
        this.$notify.success('删除成功')
        this.$refs.crud.toggleSelection();
        this.refreshChange();
      })
    },
    // 更新
    handleUpdate: function(row, index, done, loading) {
      putObj(row).then(data => {
        this.$message.success('修改成功')
        done()
        this.getList(this.page)
      }).catch(() => {
        loading();
      });
    },
    // 保存
    handleSave: function(row, done, loading) {
      addObj(row).then(data => {
        this.$message.success('添加成功')
        done()
        this.getList(this.page)
      }).catch(() => {
        loading();
      });
    },
    // 每页条数改变事件
    sizeChange(pageSize) {
      this.page.pageSize = pageSize
    },
    // 当前页发生改变事件
    currentChange(current) {
      this.page.currentPage = current
    },
    // 查询事件
    searchChange(form, done) {
      this.searchForm = form
      this.page.currentPage = 1
      this.getList(this.page, form)
      done()
    },
    // 刷新事件
    refreshChange() {
      this.getList(this.page)
    },
    //  导出excel
    exportExcel() {
      this.downBlobFile('/admin/mall/xglQrcodePayment/export', this.searchForm, 'xglQrcodePayment.xlsx')
    }
  }
}
</script>
<style lang="scss" scoped>
  .el-tag--small {
    height: 32px !important;
  }
  .qrcodeDownBtn {
    position: absolute;
    z-index: 2;
    width: 100%;
  }
  .qrcode-box {
    background: rgba(0, 0, 0, 0.2) !important;
    height: 699px;
    width: 444px;
    margin: auto;
    .downImg {
      background: url('/img/lipai.jpg') no-repeat left top;
      height: 699px;
      width: 444px;
      position: absolute;
      z-index: 1;
      .title {
        position: relative;
        top: 273px;
        font-size: 22px;
        color: #08559b;
        text-align: center;
        font-weight: bold;
      }
      canvas {
        position: relative;
        top: 265px;
        left: 124px;
      }
    }
  }
</style>